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Dont try to unmarshal if there is nothing to unmarshal #570

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Dont try to unmarshal if there is nothing to unmarshal #570

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3 changes: 3 additions & 0 deletions bson/bson.go
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Original file line number Diff line number Diff line change
Expand Up @@ -558,6 +558,9 @@ func Unmarshal(in []byte, out interface{}) (err error) {
// See the Unmarshal function documentation for more details on the
// unmarshalling process.
func (raw Raw) Unmarshal(out interface{}) (err error) {
if len(raw.Data) == 0 {
return SetZero
}
defer handleErr(&err)
v := reflect.ValueOf(out)
switch v.Kind() {
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